Light energy conversion in Halobacterium halobium.
نویسندگان
چکیده
INTRODUCTION .............................................................. 682 PURPLE MEMBRANE ....................................................... 683 BACTEBRIORHODOPSIN: A LIGHT-DRIVEN PUMP FOR PROTONS ..... ..... 686 SECONDARY GRADIENTS: TRANSMEMBRANE MOVEMENTS OF Na+, K', AND Cl................................................................... 689 AMINO ACID TRANSPORT ............... .................................... 691 PHOTOPHOSPHORYLATION ............. ................................... 695 RELATIONSHIP BETWEEN BACTERIORHODOPSIN AND THE RESPIRATORY CHAIN ............................................................... 697 PHOTOTACTIC RESPONSES ................................................. 699 BIOSYNTHESIS OF PURPLE MEMBRANE.... 699 CONCLUSIONS ................................... 699 LITERATURE CITED ................................... 700
منابع مشابه
Existence of electrogenic hydrogen ion/sodium ion antiport in Halobacterium halobium cell envelope vesicles.
Illumination causes the extrusion of protons from Halobacterium halobium cell envelope vesicles, as a result of the action of light on bacteriorhodopsin. The protonmotive force developed is coupled to the active transport of Na+ out of the vesicles. The light-dependent ion fluxes in these vesicles were studied by following changes in the external pH, in the fluorescence of the dye, 3,3'-dipenty...
متن کاملBacteriorhodopsin induces a light-scattering change in Halobacterium halobium
When suspensions of Halobacterium halobium are exposed to bright light, the light-scattering properties of the bacteria change. This light-scattering response can produce a transmission decrease of about 1% throughout the red and near-infrared region. The action spectrum for the light-scattering response appropriately matches the absorption spectrum of bacteriorhodopsin. The response is elimina...
متن کاملMotor responses of Halobacterium halobrium to sinusodial light stimuli.
Sinusoidal light stimuli have been used to elicit photoresponses in Halobacterium halobium at various periods of the stimulus. Cycle histograms and histograms of the times between consecutive reversals are used to illustrate the responses, and the method used to obtain sinusoidally modulated intense light (with periods up to 1 s) is described.
متن کاملIsolation of Photochrome Transmembrane Protein Bacteriorhodopsin from Purple Membranes of Halobacterium Halobacterium Halobium. New Method for Isolation
This paper presents improved method for isolation of photochrome transmembraine protein bacteriorhodopsin (output 5 mg from 100 g of wet biomass) capable to transform light energy to electrochemical energy of generated protons H + and АТP. The protein was isolated from purple membranes of photo-organotrophic halobacterium Halobacterium halobium by cellular autolysis by distilled water, processi...
متن کاملFabrication of biomolecule–copolymer hybrid nanovesicles as energy conversion systems
This work demonstrates the integration of the energy-transducing proteins bacteriorhodopsin (BR) from Halobacterium halobium and cytochrome c oxidase (COX) from Rhodobacter sphaeroides into block copolymeric vesicles towards the demonstration of coupled protein functionality. An ABA triblock copolymer-based biomimetic membrane possessing UV-curable acrylate endgroups was synthesized to serve as...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of supramolecular structure
دوره 2 5-6 شماره
صفحات -
تاریخ انتشار 1974